mcindoe



3 Sheets-Sheet 1.

(No Model.)

G P McINDOE MECHANISM FOR OPERATING INTERMITTENTLY REVOLVING CYLINDERS.

Patented May 30, 1893.

W iiswsses Invenior. al i 4 (950101 7 Attorney mus PEIERS 00.. mmoumou wnsumc (No Model.)

' 3 Sheets--Sheet 2. G. P. M'OINDOE. MECHANISM FOR OPERATING INTERMITTENTLY REVOLVING CYLINDERS Patented May 30,1893.

Witnesses. Inventor.

042/ b MdpWJm-L Attorney.

' Witnesses (No'Mode'L) 3 SheetsSheet 3.

G. F. McINDOE.

MECHANISM FOR OPERATING INTERMITTBNTIQY REVOLVING CYLINDERS.

No. 498,445. Patented May 30, 1893.

' Attorney.

1N5 worms PETERS 120., mofa uruo'. wasmup'roy, n. a 1

UNITED STATES PATENT OFFICE.

GEORGE F. MCINDOE, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO JAMES W. MCINDOE, OF SAMEPLAOE.

MECHANISM FOR OPERATING INTERMITTENTLY-REVOLVlNG CYLINDERS.

SPECIFICATION forming part of Letters Patent No. "198,4t5, dated May 30, 1893.

Application filed November 14, 1892. Serial No.45l,999. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE F. MoINDoE, of Boston, in the county of Suffolk and State of Massachusetts, have-invented certain new and useful Improvements in Mechanism for Operating Intermittently-Revolving Cylinders, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to mechanism for operating intermittently revolving cylinders, and is especially adapted to operate the impression cylinders of printing presses and it consists in certain novel features of construction, arrangement and combination of parts which will be readily understood by referance to the description of the accompanying drawings and the claims hereinafter contained and in which my invention is clearly pointed out.

Figure 1 of the drawings is a sectional elevation of so much of a cylinder printing press as is necessary to illustrate my invention the culling plane being on line 1, 1, on Fig. 2. Fig. 2 is a transverse vertical section on line 2, 2, on Fig. 1 and showing the principal parts of my invention in elevation. Fig. 3 is acentral longitudinal section of a portion of the impression cylinder, its operating gear and rack, its locking wheel and a portion of one frame. Fig. 4 is an elevation of the cylinderlocking wheel and roll carrying spring. Fig. 5 is an end elevation of the impression cylinder with its operating gear removed and showing the dog, a tooth carried by the operating rack or type bed and engaging said cylinder to insure the completion of its movement. Fig. 6, is a vertical section on line 3, 3, on Fig. 2 and illustrating the device for preventing the momentum of the cylinder causing it to be moved too far, and Figs. 7 and 8 are respectively a partial section and a partial side elevation of the pin carrying gear I the object and operation of which will be hereinafter explained.

In the drawings A is the frame of the machine,B the type bed and ink distributing plate.

O is the impression cylinder, and D is the cylinder-operating gear wheel firmly secured to one end of said cylinder and having teeth around about seven eighths more or less of its circumference the remaining portion of its circumference being minus teeth andcut away so as to present no obstruction to the traverse of the ordinary teeth of the rack E beneath said gear without engaging therewith when u desired in a well known manner.

The rack E is bolted firmly to the edge of the bedB, isjprovided in its upper edge with a series of gear teeth extending from its rear or right hand end as seen in Fig. 1, to within a short distance of its opposite end, the number of spaces between the rack teeth corresponding to the number or projecting teeth on the gear wheel D, andhas pivoted thereto at a the three armed lever F the upper arm of which is provided with a tooth b constructed 7 and arranged to project above the plane of the rack teeth, when in its normal position, and to engage with the periphery of the roll 0 set in a recess in the edge of the gear D, and mounted in fixed bearings in said gear so as to be revoluble' therein, the tooth on said lever serving to insure the movement of the gear D about its axis when the rack commences to move toward the left of Fig. 1, and cause the tooth d on the gear D to enter the space (1 in the rack E and thus insure the proper timing of the movement of the cylinder with the forward movement of the bed to give the impression.

The lever F haspivoted theretoat e the rod fthe opposite end of which passes through an eye or hearing in the stud gset in the rack or bed so as to be movable aboutits axis and has mounted thereon between said stud and a collar 9 secured thereon the spring h the tension of which tends to move said rod toward the right as shown in Fig. 1, and may be adjusted by moving the collar g to a greater or less distance from the stud g. The pivot e is so located on the lever F that,-when said lever is in its normal position with its upper arm in contact with the left hand end of the rack E, the center line of the rod fand the line of draft of the spring h will be above the fulcrum a of said lever, and when said lever is thrown out of its normal positioninto the position shown in dotted lines in Fig. 1, the center line of said rod and spring will be below said fulcrum a as shown in Fig. 1, so that the tension of said spring hwill hold said lever F in either of said positions until force by a tooth of the rack and the roll 0 has moved around the axis of the cylinder 0 to such a point as to be removed from contact with the tooth 1), comes in contact with the periphery of the truck G mounted upon a stud set in the frame A and is raised so as to move said lever about its pivotal connection to the rack, into the position indicated by dotted lines in Fig. 1, in which position it is heldby the tension-of the spring h until the rack has returned nearly to theextreme of its movement toward the right of Fig. 1, when the short pendent arm I) of the lever F comes in contact with the segment 1' mounted on theshaft H, and is moved about'its pivot into its normal position as shown in full lines in Fig. 1.

The shaft H is mounted in bearings in the frames A A and has firmly secured thereon, between said frames, the segment i and lever c" the former being in the same vertical plane, parallel :to said frames, as the arm b of the lever F, and outside of the left hand frame A said shaft has secured thereon the hand leverj shown in full lines in Fig. 2 and in dotted lines in Fig. 1.

In operating printing presses of the kind, in part, illustrated in the drawings it is desirable, and in fact necessary in order to ac complish the proper preliminary distribution of the ink to be able to reciprocate the type bed and ink distributing table Without 'rotating the impression cylinder and to accomplish this the operator has only to move the hand lever j from the cylinder to partially rotate the shaft H to move the segment iinto the position indicated by dotted lines, and move the lever F about the pivot a to the position relative to the rack E shown by dotted lines in Fig. 1, when the bed may be reciprocated without moving the cylinder so long as the segment i is maintained in said retracted position. In some kinds of work it is also necessary to have a double distribution of the ink during the time the printing is going on and to accomplish this I pivot to the movable end of the lever. i the upper end of the rod lo, fitted in bearings in the ears Z and 1' formed upon or secured to the inner face of a frame A,- and having a spring m fitted thereon be tween the ear Z and the collar m firmly secured on said rod and serving as an abutment for said spring, and stop to limit the downward movement of said rod. The lower end of said rod is expanded to form a lifting toe k against which the pin n set in and projecting from the gear wheel I acts to raise said rod and partially rotate the shaft H to retract the segment i to such an extent that the arm b of the leverF will not come in confact with it when the rack E is moved toward the right, with the lever F in the position indicated by dotted-lines in Fig. 1.

The gear wheel I is mounted upon a stud 0 set in and projecting from the inner face of a frame A and is acted upon by the pinion J to impart to it a complete revolution during the time required to impart to the rack E two complete back and forth motions or double reciprocations, by which arrangement the segment 2' will be retracted and advanced automatically so that at each alternate movement of the rack E toward the right-of Fig. 1 arm 17 of the lever F will not strike said segment, and as a consequence will remain in the position shown in dotted lines, relative to the rack, and said rack willbe moved toward the left of Fig. 1 again without engaging with the gear wheelD, while atthe intermediatemovements of the rack toward the right the segmenti will be in its normal position,because the pin it has passed from beneath the lifter too is and the spring on has forced the rod 70 downward, and the arm I) will come :in' ,con-

tact-with the segment i and cause the-lever F l to be moved upward about its fulcrum, and

when said rack next moves toward theleft of Fig. 1 the tooth b of said lever will engage the roll 0 to cause the-gear wheel D and cylinder (J to be moved about their axis until the teeth of the gear are in engagement with the teeth of the rack to complete said rotation.

The pin n is fitted to a bearing in the web of the gear wheel I so ;as to be movable endwise therein and about its own axis whendesired. The bearing in which said pin is fitted is slotted to receive the pin 19 set radially in the pin n so that when it is desired to have the segmentiauto matically retracted at each alternate outward movement of the .bed 13 the pin it is partially revolved initsbearing-till the pin 19 is opposite theslot in said bearingwhen the tension of the spring g, which is secured by one end to said gearand engages at its other end the head of said pin a, will force said pin toward the leftof Fig. 7, into the position shown in dotted lines in said figure when said 'pin is in position to engage the lifter toe and lift the rod 70 once at each revolution of said gear. When only single distribution is required the pin n is partially withdrawn and turned about its axis until the pin 19 rests against the side of the gear as shown in Figs. 7 and 8 when the gear D and cylinder 0 will be revolved once about their axes at each inward movement of the bed B and rack E.

The bed B or rack E has formed upon or secured to its rear or outer end the tooth r ITO 3 the bottom of which is slightly farther from the axis of said wheel than the main body of its periphery as shown in Fig. 4.

L is a spring secured by one end to the frame A and carrying in its opposite end which is forked the roll L which engages with the detent notch s to lock said cylinder in its normal or stand still position as shown in Fig. 4. By this construction the tension of the spring L which is sufficient to lock the cylinder-when in its normal or fixed position presents but very little resistance, in the shape of friction, to the rotation of the cylinder during the greater part of-its rotation.

It sometimes becomes necessary after the bed B has commenced to move toward the left of Fig. 1, to reverse its motion before it completes its movement in that direction,in which case the motion of the gear wheelI is reversed so that the pin 72 approaches the lifter-toe 7r. from above, and in order that it maypass the same without affecting the position of the segmenti the lower bearing Z of the rod is is slotted to permit a lateral movement of said rod and the lifter-toe k, the same being normally held in the position shown in Fig. 1 .by the tension of the springt surrounding the rod 25 one end of which is pivoted to the lifter-toe k and its other end has a bearing in the lug or ear a formed upon or secured to the inner face of a frame A, said springt being confined between said ear and the collar u adj ustably secured upon said rod 25' as shown in Fig. 1.

The bed B is supported upon a series of rolls or trucks M M or in any other suitable manner.

Provision has been made, as heretofore described, for insuring the full completion of the revolution of the cylinder C, but it is equally necessary to provide for the possibility of the momentum of said cylinder tending to carry said cylinder too far around its axis, and to this end, I secure upon the shaft of the cylinder 0 a crank N carrying a crank pin 1) upon which is mounted one end of a rod 1; the opposite end of which is connected to a cylinder 0, having its upper end closed and its lower end open, within which is fitted the piston P having an opening through its center which is normally closed by the valve '10 arranged to open upward, as the cylinder is moved upward by the rotation of said crank, and to close when the motion of the cylinder is reversed.

The cylinder 0 has a bearing on the piston P and another on the piston-rod P, which is firmly secured at one end to the piston,through the medium of the hub w connected to said piston by two arms 20 and passes through the hub of the bail like stand 0' secured to the open end of said cylinder and is pivoted at its other end to a frame A at 00, as shown in Figs. 2 and 6.

The cylinder 0 has set therein near its upper end a pet-cock 'y through which a portion of the air in .said cylinder above the piston may be allowed to escape when the pressure becomes too great. The compression of the air in the cylinder serves to resist the move- -ment of the cylinder aroundits axis and will in either case, acting as a dash-pot to retard or check the momentum of the cylinder in its rotation, and prevent its moving beyond the limit of a full-and complete revolution. v

The crank pin '1; may be adjusted to a greater or less distance'from the axis of ,the cylinder shaft by means of the screw '0 operated by the hand wheel 01 and workinginthe block 00. made in one piece with the crankpin o and fitted to and movable in aT shaped, or dovetailed, groovecc formed in the outer face of the crank N as shown in Figs. 2 and 6.

I claim l. The combination of 'a reciprocating toothed rack; a gear wheel tobe acted-upon thereby having a portion of its periphery free of teeth and having formed in that portion of its edge that is minus teeth a recess or pocket;

a roll located in said recess and revoluble in fixed bearings in said gear; a lever pivoted to said rack and movable therewith and provided with an arm or tooth normally projecting above the level of the rack'teeth in position to engage said roll at thecommencement-of the forward movement of said rack; means having provision for depressing said roll engaging arm or tooth before said rack commences its return movement; and means having provision for raising said arm or tooth to its normal position just before the completion of the return movement of said rack.

2. The combination of a reciprocating toothed rack; a mutilated gear wheel having a recess formed in that portion of its periphery that is minus teeth; a roll located in said recess and revoluble in fixed bearings in said gear; a lever pivoted to and movable with said. rack and provided with an arm or tooth normally projecting above the teeth of the rack in position to engage said roll at the commencement of the forward movement of said rack; means having provision for depressing said roll engaging arm or tooth before the rack commences its return movement; means for looking or holding said lever in its normal and depressed positions; and means having provision for raising said roll engaging arm or tooth to its normal position just before the completion of the return movement of the rack.

3. The combination of the rack E; the mutilated gear wheel D; the roll 0 mounted in fixed hearings in said gear; the lever F. pivoted to the rack E and provided with the arms I) b and b the roll G for moving said lever about its axis in one direction; the movable segment 11 for moving said lever in the opposite direction about its axis; and means having provision for retracting said segment to prevent contact of said lever F therewith.

4. The combination of the rack E; the mutilated gear wheel D; the roll mounted in fixed hearings in said gear; the lever F provided with the arms I), b, and b the roll G; the rod fand spring at the shaft or stud H; the segment "i; the lever 'i; the rod 70 provided with the lifter-toe 7a; the rod t; the springs m and t; the gear wheel I; and the retractible pin n all constructed arranged and operating substantially as described.

5. The combination of the rack E; the mutilated gear D; the roll 0 mounted in fixed bearings in said gear; the three armed lever F; means having provision for automatically moving said lever in both directions about its fulcrum; the locking wheel K provided with a detent notch the bottom of which is at a greater distance from the center of said wheel than the greater portion of its periphery; the spring L and truck L.

i 6. The combination of the rack E; the mutilated gear D; the roll 0 mounted in fixed bearings in said gear; the three armed lever F; means having provision for automatically moving said lever in both directions about its fulcrum; the cylinder 0 provided with the notch or shoulder 'r'; the lug or tooth r; the locking wheel K provided with a detent notch the bottom of which is at a greater distance from the center of said wheel than the greater portion of its periphery; the spring L; and the truck L carried by said spring.

7. The combination of the rack E; the mutilated gear D; the cylinder 0; the crank N secured upon the shaft of said cylinder; the crank pin '0 a dash pot operated by said crank pin and adapted to check the momentum of said cylinder; the locking wheel K constructed as set forth; the spring L; and the truck L carried by saidspring.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 8th day of November, A. D. 1892.

GEORGE F. MOINDOE.

Witnesses:

N. O. LOMBARD, GEO. A. SEWALL. 

